Kynar polyvinylidene fluoride, or polyvinylidene difluoride (PVDF) is a highly non-reactive and pure thermoplastic fluoropolymer produced by the polymerization of vinylidene difluoride.

MechanicalASTM Test MethodKynar 740 Extruded PVDFKynar 2850 Extruded PVDFUnits
Strength to Weight Ratio---ksi
Specific Gravity @73 FD7921.77 - 1.791.76 - 1.78-
Tensile Strength @73 F, (ult)/(yld)D6387,000 (yld)5,000 (yld)psi
Tensile Modulus of Elasticity @73 FD638250,000125,000psi
Tensile Elongation at Break @73 FD63850 - 250300 - 400%
Flexural Strength @73 FD7908,000-psi
Flexural Modulus of Elasticity @73 FD790250,000170,000psi
Shear Strength @73 FD732--psi
Comprehensive Strength, (% Deformation) @73 FD69510,000 (10)-psi
Comprehensive Modulus of Elasticity @73 FD695--psi
Hardness, Rockwell, Scale as noted @73 FD785---
Hardness, Durometer, Shore D @73 FD2240D78D70-
Izod Impact, (Notched) @73 FD256 Type A3.06 - 10ft-lb/in of notch
Coefficient of Friction, (Dry vs Steel) Dynamic----
Limiting PV, (with 4 to 1 factor of safety applied)---psi-ft/min
ThermalASTM Test MethodKynar 740 Extruded PVDFKynar 2850 Extruded PVDFUnits
Coefficient of Linear Thermal Expansion @73 FE-831 (TMA)6.6 E-057.8 E-05in/in/F
Heat Deflection Temperature @264 psiD648221104F
Tg-Glass transition termperature, (Amorphous)D3418--F
Melting Point, (VS=Vicat Softening Temp.)D3418--F
Continuous Service Temperature in Air, (Max.)---F
Thermal Conductivity-1.181.11BTU-in/hr-ft2-F
ElectricASTM Test MethodKynar 740 Extruded PVDFKynar 2850 Extruded PVDFUnits
Dielectric Strength, Short TermD149--Volts/mil
Volume ResistivityD2572.0 E+142.0 E+14ohm-cm
Dielectric Constant @10E6 HzD150---
Dissipation Factor @10E6 HzD150---
Flammability @3.1 mm unless notedUL94---
H2OASTM Test MethodKynar 740 Extruded PVDFKynar 2850 Extruded PVDFUnits
Water Absorption, Immersion, 24 hoursD570(7)0.030.04% by weight
Water Absorption, SaturationD570(7)--% by weight